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Re: Residential garage floor live load

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        Why not also check out the AASHO (or AASHTO) code for bending moment formulae for wheel loads?  Once you find the correct section in the code it will only take about five minutes to check out the reinforcing requirement for any specified wheel load.
        I haven't followed this line from the beginning; but if you live in a location where salt is used for de-icing the roads you should take precautions to protect the reinforcing from corrosion.
H. Daryl Richardson
----- Original Message -----
Sent: Sunday, November 02, 2008 1:23 PM
Subject: RE: Residential garage floor live load

ASCE 7-05, table 4-1 footnote a):

Floors in garages or portions of a building used for the storage of motor vehicles shall be designed for the uniformly distributed live loads of Table 4-1 or the
following concentrated load: (1) for garages restricted to passenger vehicles accommodating not more than nine passengers, 3,000 lb (13.35 kN) acting on an area of 4.5 in. by 4.5 in. (114 mm by 114 mm) footprint of a jack; and (2) for mechanical parking structures without slab or deck that are used for storing
passenger car only, 2,250 lb (10 kN) per wheel.

-----Original Message-----
From: Jeff Smith [mailto:jeffsmith7(--nospam--at)]
Sent: Sunday, November 02, 2008 11:31 AM
To: seaint(--nospam--at)
Subject: RE: Residential garage floor live load

Not at the office, but I beleive ACSE has language about a point load based on a jack. Theoretically someone could use a floor jack that could transfer more than half of the car load. Land Rovers and say an F150 are over 6000 pounds.


From: Gerard Madden, SE [mailto:gmse4603(--nospam--at)]
Sent: Sunday, November 02, 2008 11:12 AM
To: seaint(--nospam--at)
Subject: Re: Residential garage floor live load

I used to design them for the wheel load of a Ford Excursion. I don't know how many of those are selling now adays, but I would be very conservative in your design if I were you.


On Sun, Nov 2, 2008 at 8:16 AM, ken ng <zy7up(--nospam--at)> wrote:

I never have any project which the 2 cars garage slab is located above the bedrooms.  I used live load = 50 psf.  Does 50 psf live load is under estimate?  Should I include 1,500# concentrate wheel load?